中国石油大学学报（自然科学版）2016，Vol.40Issue(6)：9-21,13.DOI:10.3969/j.issn.1673-5005.2016.06.002
松南中央坳陷泉四段上生下储式致密砂岩油成藏主控因素
Main controlling factors of above-generation and below-storage tight sandstone oil reservoirs at Quantou 4 Formation of central depression in southern Songliao Basin
摘要
Abstract
This paper systematically studied different types of tight sandstone oil reservoirs in Quantou 4 Formation,based on the theory of "high-quality source rocks control hydrocarbon accumulation" and the idea of "explore tight oil through sweet spots". Extensive field data such as logging,oil tests and sandstone thin sections were used. The results show that the tight sandstone oil reservoir is widely distributed in Changling depression and its surrounding slope area,which is characterized as full oil whole depression but with rich deposition imbalancedly distributed more in the eastern and southern regions. The dis-tribution range of high-quality source rocks whose TOC>2. 0% at bottom of Qingshankou 1 Formation controls the pattern of the tight sandstone oil reservoir. The relation between abnormally high pressure and source faults controls the formation of oil resovior in the lower part of Quantou 4 Formation. The maximum depth of down-migration is estimated 140 m. The area whose overpressure higher than 10 MPa and distance faults shorter than 2 500 m is an enrichment area of tight sandstone oil reservoir inⅡ~Ⅳsand group of Quantou 4 Formation. These sweet spots of high-quality reservoir control the degrees of en-richment and production of tight sandstone oil reservoir. Our research indicates that "directly drained migration" within source rocks area and "reverse fault screened" in the side slope are two main models for above-generation and below-storage tight sandstone oil reservoirs to formed in depressed lake basins.关键词
主控因素/致密砂岩油藏/上生下储/泉四段/松南中央坳陷区Key words
main controlling factors/tight sandstone oil reservoirs/above-generation and below-storage/Quantou 4 Forma-tion/central depression in southern Songliao Basin分类
能源科技引用本文复制引用
蔡来星,卢双舫,张训华,黄文彪,肖国林,吴志强..松南中央坳陷泉四段上生下储式致密砂岩油成藏主控因素[J].中国石油大学学报（自然科学版）,2016,40(6):9-21,13.基金项目
国家“973”专项课题(2014CB239005) （2014CB239005）
国家重点自然科学基金项目(41330313) （41330313）
国家自然科学基金项目(41402109) （41402109）
国家油气重大专项(2011ZX05007-001) （2011ZX05007-001）
